August Weather in Harrisburg, United States

Last updated: June 24, 2025

In Harrisburg, United States, the average temperature in August hovers around 22°C (73°F). Expect a minimum chill of 7°C (45°F) and a potential peak of 36°C (98°F). With an average humidity of 84% and about 35 mm (1.4 in) of precipitation over 8 days, it’s a perfect time to enjoy the cozy vibes while staying prepared for the occasional shower!

August Temperature in Harrisburg

In August in Harrisburg, the average temperature is 22°C (73°F), with maximums reaching up to 36°C (98°F) and minimums dropping as low as 7°C (45°F). This makes it a perfect time for travelers to enjoy a range of outdoor activities while being prepared for potential temperature fluctuations.

August Weather in Harrisburg: Daily Temperature Highs, Lows, and Averages

The chart illustrates August temperature patterns in Harrisburg, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Harrisburg, August typically has an average temperature of 22°C (73°F), with highs reaching up to 36°C (98°F) and lows dropping to around 7°C (45°F).

Data source: Temperature data for Harrisburg generated using information from the Copernicus Climate Change Service.

August Precipitation in Harrisburg

In Harrisburg in August, the precipitation amount is 35 mm (1.4 in) over the course of 8 days.

August Precipitation Trends in Harrisburg

The chart displays monthly precipitation patterns in Harrisburg, with values for each month alongside August’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how August’s conditions compare to those of other months. In Harrisburg, August typically receives around 35 mm (1.4 inches) of precipitation spread over approximately 8 days.

Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

August Humidity in Harrisburg

In Harrisburg in August, humidity is 84%. With an average temperature of 22°C (73°F), this humidity feels like a warm, enveloping blanket, making outdoor activities quite uncomfortable and necessitating frequent breaks to stay hydrated while exploring.

August Average Humidity in Harrisburg

This chart illustrates the average monthly humidity levels in Harrisburg, with August’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In August, average humidity in Harrisburg is approximately 84%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for August generated using information from the Copernicus Climate Change Service.

August UV Index in Harrisburg

In Harrisburg in August, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Harrisburg.

Maximum UV Index Levels in Harrisburg for August

The chart shows the monthly maximum UV Index (UVI) for Harrisburg in August, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In August, the maximum UV index in Harrisburg typically reaches 10, which falls under the very high exposure category.

Data source: Harrisburg August UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

Extreme (11+): Avoid the sun, stay in shade.
Very High (8-10): Limit sun exposure.
High (6-7): Use SPF 30+ and protective clothing.
Moderate (3-5): Midday shade recommended.
Low (0-2): No protection needed.

How August Weather in Harrisburg Compares to Other Months

Weather in Harrisburg varies notably across the year, with each month offering distinct climate conditions. This page compares August’s weather to other months in Harrisburg, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Harrisburg, showing how August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	0°C (32°F)	14 mm (0.6 inches)	72%	moderate
February Weather	-2°C (30°F)	23 mm (0.9 inches)	76%	moderate
March Weather	5°C (40°F)	67 mm (2.7 inches)	61%	high
April Weather	8°C (46°F)	53 mm (2.1 inches)	60%	very high
May Weather	13°C (55°F)	117 mm (4.6 inches)	74%	very high
June Weather	21°C (69°F)	57 mm (2.2 inches)	82%	extreme
July Weather	24°C (75°F)	46 mm (1.8 inches)	82%	extreme
August Weather	22°C (73°F)	35 mm (1.4 inches)	84%	very high
September Weather	19°C (66°F)	24 mm (1.0 inches)	75%	very high
October Weather	9°C (48°F)	36 mm (1.4 inches)	73%	high
November Weather	5°C (42°F)	25 mm (1.0 inches)	74%	moderate
December Weather	1°C (35°F)	18 mm (0.7 inches)	77%	moderate